readlink_chk.c

/* Copyright (C) 2005 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */#include <unistd.h>#include <sys/param.h>#ifdef HAVE_INLINED_SYSCALLS# include <errno.h># include <sysdep.h>#endif
ssize_t
__readlink_chk (constchar *path, void *buf, size_t len, size_t buflen)
{
if (len > buflen)
__chk_fail ();
#ifdef HAVE_INLINED_SYSCALLSreturn INLINE_SYSCALL (readlink, 3, path, buf, len);
#elsereturn __readlink (path, buf, len);
#endif}